Tim Andreas Osswald (born June 6, 1958, Bogotá, Colombia) is a mechanical engineer and the K. K. and Cindy Wang Professor in the Department of Mechanical Engineering at the University of Wisconsin-Madison. He is also honorary professor at the University of Erlangen-Nuremberg in Germany and the National University of Colombia. Osswald has authored 12 books in the field of polymer engineering and teaches polymer processing and designing with polymers. His research includes modeling and simulation in polymer processing, engineering design with plastics, sustainability and biopolymers.
Osswald is co-founder and present co-director of the Polymer Engineering Center.The center is dedicated to the solution of problems in the plastics industry through education, training, and research at the College of Engineering at the University of Wisconsin-Madison since 2001.
Osswald serves as the English-language editor of the Journal of Plastics Technologyand as an editor for the Americas of the Journal of Polymer Engineering.
Osswald attended the South Dakota School of Mines and Technology from 1978 to 1982, where he received a B.S. degree and a M.S. degree in mechanical engineering. In 1987 he received a Ph.D. in mechanical engineering from the University of Illinois at Urbana-Champaign. Between 1987 and 1989 he was an Alexander von Humboldt research fellow at the Institute for Plastics Processing (Institut für Kunststoffverarbeitung) in Aachen, Germany.
Osswald was recipient of the Presidential Young Investigator Award in 1991 granted by the National Science Foundation.In 2001 he was the first academic to receive the VDI-K Dr-Richard-Escales-Preis (de:Ernst Richard Escales) (Plastics Division of the German Engineering Association, de:Verein Deutscher Ingenieure). In 2006 he was named an honorary professor at the University of Erlangen-Nuremberg in Germany and in 2010 honorary professor at the National University of Colombia.
Osswald serves as faculty advisor to Theta Tau Professional Fraternity to the Society of Hispanic Professional Engineers and to the Society of Plastics Engineers.
Osswald is author and co-author of several influential books in plastics engineering including the International Plastics Handbook. His work has been translated into many foreign languages, including Spanish, German, Russian, Chinese, Korean and Japanese.
Osswald is also the series editor of Plastics Pocket Power (Hanser Verlag, 2001), which currently includes 6 books.
Osswald was born in Bogotá, Colombia. At the age of 4, his family moved to Cúcuta, Colombia. After graduating from High School, he was an exchange student in Rapid City, South Dakota with Florida Cultural Exchange for one year. He returned to Rapid City to get his B.S. and M.Sc. degrees in 1977. He then continued his graduate studies in Urbana, Illinois where he met his wife.
Osswald and his wife, Diane, have a son, Paul, and a daughter, Ruthie, and were married in Aachen, Germany in 1988. They live in Madison, Wisconsin.
Polypropylene (PP), also known as polypropene, is a thermoplastic polymer used in a wide variety of applications. It is produced via chain-growth polymerization from the monomer propylene.
In materials science, a thermosetting polymer, often called a thermoset, is a polymer that is obtained by irreversibly hardening ("curing") a soft solid or viscous liquid prepolymer (resin). Curing is induced by heat or suitable radiation and may be promoted by high pressure, or mixing with a catalyst. Heat is not necessarily applied externally, but is often generated by the reaction of the resin with a curing agent. Curing results in chemical reactions that create extensive cross-linking between polymer chains to produce an infusible and insoluble polymer network.
Polyoxymethylene (POM), also known as acetal, polyacetal, and polyformaldehyde, is an engineering thermoplastic used in precision parts requiring high stiffness, low friction, and excellent dimensional stability. As with many other synthetic polymers, it is produced by different chemical firms with slightly different formulas and sold variously by such names as Delrin, Kocetal, Ultraform, Celcon, Ramtal, Duracon, Kepital, Polypenco, Tenac and Hostaform.
Wood-plastic composites (WPCs) are composite materials made of wood fiber/wood flour and thermoplastic(s) such as polythene (PE), polypropylene (PP), polyvinyl chloride (PVC), or polylactic acid (PLA).
Plastics engineering encompasses the processing, design, development, and manufacture of plastics products. A plastic is a polymeric material that is in a semi-liquid state, having the property of plasticity and exhibiting flow. Plastics engineering encompasses plastics material and plastic machinery. Plastic machinery is the general term for all types of machinery and devices used in the plastics processing industry. The nature of plastic materials poses unique challenges to an engineer. Mechanical properties of plastics are often difficult to quantify, and the plastics engineer has to design a product that meets certain specifications while keeping costs to a minimum. Other properties that the plastics engineer has to address include: outdoor weatherability, thermal properties such as upper use temperature, electrical properties, barrier properties, and resistance to chemical attack.
Blow molding is a manufacturing process for forming and joining together hollow plastic parts. It is also used for forming glass bottles or other hollow shapes.
Polysulfones are a family of high performance thermoplastics. These polymers are known for their toughness and stability at high temperatures. Technically used polysulfones contain an aryl-SO2-aryl subunit. Due to the high cost of raw materials and processing, polysulfones are used in specialty applications and often are a superior replacement for polycarbonates.
Eric Baer, born Erich Bär, is an American scientist and engineer known for his major research and educational contributions to polymer science and engineering. He is a leading pioneer in understanding the complex relationships between solid state structure, processing, and properties of polymeric materials and systems.
Fusible core injection molding, also known as lost core injection molding, is a specialized plastic injection molding process used to mold internal cavities or undercuts that are not possible to mold with demoldable cores. Strictly speaking the term "fusible core injection molding" refers to the use of a fusible alloy as the core material; when the core material is made from a soluble plastic the process is known as soluble core injection molding. This process is often used for automotive parts, such as intake manifolds and brake housings, however it is also used for aerospace parts, plumbing parts, bicycle wheels, and footwear.
An injection molding machine, also known as an injection press, is a machine for manufacturing plastic products by the injection molding process. It consists of two main parts, an injection unit and a clamping unit.
Filler materials are particles added to resin or binders that can improve specific properties, make the product cheaper, or a mixture of both. The two largest segments for filler material use is elastomers and plastics. Worldwide, more than 53 million tons of fillers are used every year in application areas such as paper, plastics, rubber, paints, coatings, adhesives, and sealants. As such, fillers, produced by more than 700 companies, rank among the world's major raw materials and are contained in a variety of goods for daily consumer needs. The top filler materials used are ground calcium carbonate (GCC), precipitated calcium carbonate (PCC), kaolin, talc, and carbon black. Filler materials can affect the tensile strength, toughness, heat resistance, color, clarity etc. A good example of this is the addition of talc to polypropylene. Most of the filler materials used in plastics are mineral or glass based filler materials. Particulates and fibers are the main subgroups of filler materials. Particulates are small particles of filler which are mixed in the matrix where size and aspect ratio are important. Fibers are small circular strands that can be very long and have very high aspect ratios.
Willis Harmon Ray is an American chemical engineer, control theorist, applied mathematician, and a Vilas Research emeritus professor at the University of Wisconsin–Madison notable for being the 2000 winner of the prestigious Richard E. Bellman Control Heritage Award and the 2019 winner of the Neal Amundson Award.
A thermoset polymer matrix is a synthetic polymer reinforcement where polymers act as binder or matrix to secure in place incorporated particulates, fibres or other reinforcements. They were first developed for structural applications, such as glass-reinforced plastic radar domes on aircraft and graphite-epoxy payload bay doors on the Space Shuttle.
Robert Byron Bird was an American chemical engineer and professor emeritus in the Department of Chemical Engineering at the University of Wisconsin-Madison. He was known for his research in transport phenomena of non-Newtonian fluids, including fluid dynamics of polymers, polymer kinetic theory, and rheology. He, along with Warren E. Stewart and Edwin N. Lightfoot, was an author of the classic textbook Transport Phenomena. Bird was a recipient of the National Medal of Science in 1987.
Crystallization of polymers is a process associated with partial alignment of their molecular chains. These chains fold together and form ordered regions called lamellae, which compose larger spheroidal structures named spherulites. Polymers can crystallize upon cooling from melting, mechanical stretching or solvent evaporation. Crystallization affects optical, mechanical, thermal and chemical properties of the polymer. The degree of crystallinity is estimated by different analytical methods and it typically ranges between 10 and 80%, with crystallized polymers often called "semi-crystalline". The properties of semi-crystalline polymers are determined not only by the degree of crystallinity, but also by the size and orientation of the molecular chains.
Chi Ming Chan, is a Chinese chemical engineer at the Hong Kong University of Science and Technology (HKUST).
James Lindsay White was an American polymer scientist.
High-performance plastics are plastics that meet higher requirements than standard or engineering plastics. They are more expensive and used in smaller amounts.
Christopher W. Macosko (1944) is an American chemical engineer and professor emeritus in the Department of Chemical Engineering and Materials Science at the University of Minnesota. He is internationally known for his work in polymer science and engineering, especially in the areas of rheology and polymer processing. Macosko is an author of more than 500 academic papers, dozens of patents, and two books including the text: "Rheology: Principles, Measurements and Applications". He served as Director of the Industrial Partnership for Research in Interfacial and Materials Engineering (IPRIME), a university-industry consortium at the University of Minnesota, from 1999 to 2018. Macosko and his wife Kathleen have been married since 1967 and are long-time residents of Minneapolis. They have four children and 12 grandchildren.
Rudolf Erdmenger was a German mechanical engineer and process engineer and the main inventor of the co-rotating twin screw extruder.